Cycads sp. Tayl.& Egge.,1969
- Citations total:
- 2
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| original | Late Pennsylvanian | USA | Taylor,T.E. et al. Studies of spores from Carboniferous fructifications. 1. Introduction and preliminary survey utilizing the Scanning Electron Microscope. | 1969 | |
| original | Late Pennsylvanian | USA | Kedves,M. Tranmission Electron Microscopy of the Fossil Gymnosperm Exines. | 1994 |